The electric double layer effect on the microchannel flow stability and heat transfer

Tardu, Sedat F.

doi:10.1016/j.spmi.2004.02.024

Cited by 14 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine the conduction current, two modes are available. One is called Electrical Current Balance (ECB) mode [22,23] and the other is Electrical Current Density Balance (ECDB) mode [24].…”

Section: Poisson-boltzmann Equationmentioning

confidence: 99%

“…Furthermore, their results indicated the effects of boundary slip are reduced sharply by considering the modification of apparent viscosity. Tardu [22,23] studied the EDL effects on the stability and heat transfer of Poiseuille flow in microchannels. His results showed that the critical Reynolds number decreased considerably when the thickness of the EDL became comparable with the channel diameter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combined effects of EDL and boundary slip on mean flow and its stability in microchannels

You

Guo

2010

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

The effects of an electrical double layer (EDL), boundary slip and their combined effects on the microchannel flow stability are investigated. Instead of applying the traditional streaming electrical current balance (ECB) mode, a newly introduced electrical current density balance (ECDB) mode is used to compute the conduction current when the effects of EDL is considered. The modified N-S equations and Poisson-Boltzmann equation together with the ECDB mode and Navier slip boundary are the theoretical basis for the present approach. The stability analysis considering the modifications of EDL and boundary slip is built up by the small perturbation method. It is found that the effect of EDL results in inflexions on the mean velocity profile near walls and destabilizes the stability of flow. On the contrary, the effect of boundary slip stabilizes the stability of flow. The effectiveness of boundary slip on the mean velocity and flow stability is influenced strongly by the effect of EDL. The effect of boundary slip can be disappeared when the Zeta potential is large enough.

show abstract

Section: Poisson-boltzmann Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combined effects of EDL and boundary slip on mean flow and its stability in microchannels

You

Guo

2010

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

show abstract

“…However, the transitional Reynolds number decreases by a factor nearly equal to 2 under the effect of EDL at k = 41. Sedat (Tardu, 2004) studied the electric double layer effect on the microchannel flow stability and heat transfer and observed that the critical Reynolds number ranges from 3,190 to 5,772 for different flow scenario. In addition, a detailed mathematical analysis is to be carried out to verify the regularity of this model with the proposed boundary conditions.…”

Section: Heat Transfer In Microchannelmentioning

confidence: 99%

Study of electrokinetic effects for heat transfer in microchannel with sinusoidal thermal boundary conditions

Haq

Zhao

2019

HFF

View full text Add to dashboard Cite

Purpose The purpose of this study is to obtain the numerical as well as regularity results for the nonlinear elliptic set of equations arising in the study of fluid flow in microchannel induced by the pressure in the presence of interfacial electrokinetic effects. Design/methodology/approach For the numerical study, the authors implemented traditional FDM approach, and for the regularity results they used the classical energy estimates. The interfacial electrokinetic effects result in an additional source term in classical momentum equation, hence affecting the characteristics of the flow and heat transfer. The sinusoidal temperature variation is assumed on side walls. Findings The results were obtained for various combinations of physical parameters appearing in the governing equations. This study concludes that in the presence of electric double layer, the average heat transfer rate reduces along with larger values of Reynolds number. It is observed that the heat transfer increases with the increase in amplitude ratio and phase deviation. The flow behavior and heat transfer rate inside the microchannel are also strongly affected by the presence of κ (kappa). Originality/value To the best of the authors’ knowledge, the problem of heat transfer through microchannel in combination with sinusoidal temperature variation at boundary with electric double layer effects has not been considered previously. Hence, this paper focuses on the influence of the sinusoidal boundary temperature distributions on both sidewalls of a rectangular microchannel through parallel plates with electrokinetic effects on the pressure-driven laminar flow. In addition, a detailed mathematical analysis is also to be carried out to verify the regularity of this model with the proposed boundary conditions. The study used the classical energy method to get the regularity results.

show abstract

“…Tardu [22] suggested that the EDL destabilizes the linear modes of the Poiseuille channel flow and the early transition in microchannels is plausible. The most significant effect of EDL is the decrease in the critical Reynolds number, rather than the increase in friction coefficient or the apparent viscosity.…”

Section: The Electrical Double Layer Effect On Flow and Heat Transfermentioning

confidence: 99%

“…Interfacial effects may have impacts on flow stability on microscale like the electric double layer (EDL) on flow stability in micro channel [21,22] . Tardu showed that the EDL destabilizes the linear modes and that the critical Reynolds number decreases significantly when the thickness of the double layer becomes comparable with the height of the channel.…”

mentioning

confidence: 99%

Some effects of interface on fluid flow and heat transfer on micro- and nanoscale

Liang

2007

CHINESE SCI BULL

View full text Add to dashboard Cite

The interfacial effects on flow and heat transfer on micro/nano scale are discussed in this paper. Different from bulk cases where interfaces can be simply treated as a boundary, the interfacial effects are not limited to the interface on a microscale but could extend into a significant, even the whole domain of the flow and heat transfer field when the characteristic size of the domain is close to the mean free path (MFP) of the carriers inside an object. Most of microscale thermal phenomena result from interfacial interactions. Any changes in the interactions between the object and boundary particles, such as the force between fluid and solid wall particles, microstructure of interfaces, could affect thermal properties, flow and heat transfer characteristics and hence change thermal conductivity, velocity and temperature profiles, friction coefficient and thermal radiative properties, etc. The properties of nanostructure or flow and heat transfer features of fluid in micro/nanostructures not only depend on themselves, but also on the interaction with the interface because the interface impact can go deep inside the flow. The same fluid, same channel geometry but different wall materials could have different flow and heat transport characteristics on microscale.

show abstract

The electric double layer effect on the microchannel flow stability and heat transfer

Cited by 14 publications

References 22 publications

Combined effects of EDL and boundary slip on mean flow and its stability in microchannels

Combined effects of EDL and boundary slip on mean flow and its stability in microchannels

Study of electrokinetic effects for heat transfer in microchannel with sinusoidal thermal boundary conditions

Some effects of interface on fluid flow and heat transfer on micro- and nanoscale

Contact Info

Product

Resources

About